The wearable biosensing and food safety monitoring equipment requires high-brightness and thermally stable nearinfrared (NIR) phosphor-converted light emitting diodes (pc-LEDs), and the performance of these pc-LEDs is highly dependent on the properties of the NIR phosphors. This work reports an ultrawide near-infrared emission phosphor Ca 3 Sc 2 Si 3 O 12 : Cr 3+ . Under 460 nm excitation, Ca 3 Sc 2 Si 3 O 12 : Cr 3+ presents an ultrawide emission range from 650 to 900 nm. The weak absorption capacity of Cr 3+ is the main factor causing its undesirable luminous efficiency. Ce 3+ was introduced into the matrix as a role of sensitizer to contribute to the improvement of the absorption of Cr 3+ . An efficient process for energy transfer from Ce 3+ to Cr 3+ can be observed within the Ca 3 Sc 2 Si 3 O 12 codoped substance with Ce 3+ and Cr 3+ . The sample with the best doping concentration has demonstrated excellent thermal stability. At a particular temperature at 150 °C, the phenomenon of the near-infrared emission intensity is maintained at 82% at room temperature. The output power of the NIR-pc-LED based on the Ca 3 Sc 2 Si 3 O 12 : Ce 3+ , Cr 3+ and 450 nm chip reached 21.65 mW@350 mA. The excellent performance of penetrating human tissues demonstrated by the near-infrared pc-LED was observed.
An environmentally friendly nanoparticle-supported catalyst was successfully prepared via in situ ionic complexation between imidazolium-based polymer ionic liquid (PIL) and poly(l-prolinamide-co-MAA). The physical and chemical properties of the obtained nanoparticles were characterized by TEM, FTIR, XPS, and static water contact angle experiments. The surface properties of the nanoparticle were found to significantly affect the catalytic performance. The nanoparticle with PIL outer facilitated the adsorption of reaction substrate in it. As a result, the catalytic system catalyzed the asymmetric Aldol reaction and multicomponent reaction in pure water efficiently. The catalytic system was able to be reused and recycled five times, and with no discernible loss in catalytic activity and enantioselectivity. These findings suggest that nanoparticles based on PIL may provide a new approach for preparing high performance supported catalysts for organic reactions in water. This technology also addresses issues associated with mass transfer in pure water reactions.
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